Medical elongated body

a technology of elongated body and tube body, which is applied in the field of medical elongated body, can solve the problems of uneconomical preparation of multiple medical elongated bodies, inability to insert guide wires into tube bodies, and inability to follow the distal portion of the tube body guide wires, etc., and achieves favorable maintainability

Active Publication Date: 2020-04-28
TERUMO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

Enables the insertion of multiple guide wires with varying diameters while maintaining favorable maneuverability, eliminating the need for multiple catheters and enhancing economic efficiency.

Problems solved by technology

When moving the medical elongated body within a curved biological lumen, for example, there is a possibility that the distal portion of the tube body may not follow the guide wire and may unintentionally come into contact with an inner wall of the biological lumen even if the guide wire follows the shape of the biological lumen when the clearance between the guide wire and the tube body is too large.
If the inner diameter of the tube body is too small with respect to the outer diameter of the guide wire, it is impossible to insert the guide wire into the tube body.
Preparing multiple medical elongated bodies is not economical.

Method used

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  • Medical elongated body
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Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0017]A balloon catheter 100 (corresponding to a “medical elongated body”) according to the present embodiment will be described with reference to FIGS. 1(A) to 4(D). FIGS. 1(A)-1(C) is a schematic view showing the balloon catheter 100 according to the present embodiment. FIGS. 2 and 3(A)-3(D) are schematic views showing a distal member 140 of the balloon catheter 100 illustrated in FIGS. 1(A)-1(C). FIGS. 4(A)-4(D) are schematic views showing an example of using the balloon catheter 100 illustrated in FIG. 1(A). Note that FIGS. 1(A) and 1(B) simply show the shape of a dilation portion 120 in a deflated state, and the dilation portion 120 is actually folded over the outer circumference of an inner tube 112 of a shaft 110.

[0018]The balloon catheter 100 in the embodiment illustrated in FIG. 1(A) is a medical instrument for treating a stenosed site generated in a blood vessel of a lower limb. The stenosed site is treated by widening the stenosed site. However, the balloon catheter 100 i...

modification example of first embodiment

[0064]FIGS. 5(A)-5(C) are views showing a distal member 240 according to a modification example of the first embodiment. Note that the same reference numerals will be given to the same configurations as those in the first embodiment, and the description of similar aspects of the first embodiment will not be repeated.

[0065]The distal member 240 according to the modification example of the first embodiment is different from the first embodiment because the distal member 240 includes convex portions 244, 245, and 246 protruding towards a lumen 141b of the distal member 240 on an inner surface 240d of the distal member 240 as shown in FIG. 5(A). The distal member 240 according to the modification example of the first embodiment is described in detail below.

[0066]A first convex portion 244 protruding toward the lumen 141b of the distal member 240 on the inner surface 240d of the distal member 240 is formed in the region between a distal surface C0 of the distal member 240 (i.e., the dist...

second embodiment

[0074]FIG. 6 is a view showing a distal member 340 according to a second embodiment. Note that the same reference numerals will be given to the same configurations as those in the first embodiment, and the description of similar aspects of the first embodiment will not be repeated.

[0075]The distal member 340 according to the second embodiment is different from the first embodiment in that marker portions 342 and 343 do not have a groove portion and are constituted of a colored line. The distal member 340 according to the second embodiment is described in detail below.

[0076]The first marker portion 342 of the embodiment illustrated in FIG. 6 is an annular line extending in a circumferential direction on the outer surface 140c of the distal member 340. The first marker portion 342 has a different color than the region A3 of the outer surface 140c distal to the first marker portion 342 and a color different than the region A4 of the outer surface 140c of the distal member 340 proximal ...

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Abstract

A medical elongated body including a catheter main body. The catheter main body has a tubular body and a lumen. The tubular body includes a guide wire lumen into which a guide wire is insertable. The tubular body also a distal member positioned at the distal portion of the tubular body. The distal member has a lumen that communicates with the guide wire lumen. The inner diameter of the distal member decreases between the proximal end and a distal end opening of the distal member. The medical elongated body also includes a visible marker that extends circumferentially on the outer surface of the distal member to indicate a position of the distal member in the axial direction corresponding to a predetermined inner diameter of the distal member. The visible marker is visible before the medical elongated body is inserted into a living body.

Description

CROSS-REFERENCES TO RELATED APPLICATIONS[0001]This application claims priority to Japanese Patent Application No. 2016-003872 filed on Jan. 12, 2016, the entire content of which is incorporated herein by reference.TECHNICAL FIELD[0002]The present invention relates to a medical elongated body.BACKGROUND ART[0003]A medical instrument including a catheter main body consisting of an elongated tube shaped body is used when performing various kinds of medical treatment in a lesion area generated in a biological lumen of a living body. For example, a medical elongated body such as a balloon catheter which performs treatment of widening a stenosed site generated in a biological lumen is generally known as this kind of medical instrument.[0004]In general, the medical elongated body is delivered to the lesion area generated in the biological lumen by moving along a guide wire which has been previously introduced into the biological lumen. The medical elongated body has a tube body and include...

Claims

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Application Information

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Patent Type & AuthorityPatents(United States)
IPC IPC(8): A61M25/10A61M25/00
CPCA61M25/0026A61M25/1002A61M25/104A61M2210/1032A61M2210/12A61M2210/1042A61M2025/0008A61M2025/0004A61M2210/105A61M25/0009A61M2210/1089A61M25/0074A61M25/0069
InventorSHIMADA, DAISUKE
OwnerTERUMO KK